Morehouse's son is one of roughly 400 American children kidnapped to Japan since the U.S. State Department began tracking cases in 1994.

Morehouse started a foundation called Bring Abducted Children Home (BACHome), which raises awareness about those families. He says Japan has never returned any one of those abducted children.

Now, more legislators than ever are backing Morehouse. This week, Senator Patty Murray and Senator Maria Cantwell penned a letter to President Obama urging him to raise the issue of abducted American children during his current visit to Japan.

"We believe now is the time for Japan to prove they are serious about changing course on the ongoing, and worsening, crisis of international parental child abduction," they write.

When reached for comment Saturday afternoon, Senator Murray's office said they delivered the letter, though they have not received a message back from Obama's administration. They are awaiting that in the near future.

Meanwhile Morehouse waits, as he has for six years, dreaming of a moment he describes as "unimaginable."